Chlorine-free powdery cement grinding aid and preparation method thereof

Abstract

The invention discloses a chlorine-free powdery cement grinding aid suitable for fly ash, which comprises the following components in parts by weight: 0-5 parts of alkanolamine, 2-5 parts of polylol,15-75 parts of sulfate, 5-20 parts of acetate, 0-5 parts of lignosulphonate, 2-6 parts of carbohydrate organic matter, 5-25 parts of miltonite, 0-25 parts of carbamide and 5-50 parts of inorganic carrier material. The invention also discloses a preparation method of the chlorine-free powdery cement grinding aid suitable for the fly ash. A compound grinding aid can lower the cement cost and uses the fly ash for replacing partial clinker to save the clinker dosage by 10-15 percent on the premise of keeping the cement strength unchanged, and uses extra 10-15 parts of fly ash without increasing the required water amount of cement standard consistency; the cost of the cement per ton is lowered by more than 10 Yuan.

Description

technical field [0001] The invention belongs to a compound grinding aid used in the technical field of cement grinding and a preparation method thereof, and particularly relates to reducing power consumption of cement grinding and reducing cement grinding in the production of cement grinding with fly ash as the main mixed material. A chlorine-free powder cement grinding aid for standard consistency water requirement, improving cement early and later strength and a preparation method thereof. Background technique [0002] In cement production, in order to increase grinding efficiency, reduce mill power consumption, and improve cement quality, a small amount of grinding aid is often added during the grinding process. Cement grinding aids are beneficial to reduce the surface energy of the material during the grinding process, eliminate the static electricity between the fine powder particles of the material, and improve the fluidity of the material in the mill, thereby increasi...

AI Technical Summary

Problems solved by technology

[0004] In addition, the powder cement grinding aids currently commonly used in China have a better effect on strengthening cement, but most of them are used in a relatively high amount, generally 0.8-1%, and often contain relatively high chloride salts, which are of great importance for improving cement. Early strength and increasing the amount of mixed materials are helpful, but it is easy to cause corrosion of steel bars in concrete, affecting the service life and durability of concrete, thus hindering its further development, promotion and application

Images